Process Control and Instrumentation
Continuous measurement of moisture content of paper in paper industry is done by measuring the

Magnetic susceptibility
None of these
Thermal conductivity through the paper
Electrical resistance through the paper

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Process Control and Instrumentation
Routh test

Can not determine as to how many roots of the characteristics equation have positive real roots
Cannot be used to test the stability of a control system containing transportation lag
Criterion provides information about the actual location of roots
Criterion is not applicable to systems with polynomial characteristic equation

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